The Underworld was not meant to know the sea.

Its rivers obeyed strict rules. Its depths were measured. Its darkness was constant, controlled, eternal. Zagreus had grown within those boundaries, forged by flame and shadow, restless by nature but bound by blood.

Then you crossed his path.

You were the daughter of Poseidon, born of tides and storms, carrying the ocean’s vastness in your presence. Salt clung to your divinity. Power moved around you like a living thing—unpredictable, uncontainable. You did not belong in the Underworld.

That was precisely why Zagreus could not stop thinking of you.

Your laughter echoed like crashing waves in a realm that knew only silence. Your power did not dominate—it endured. Where his fire burned and vanished, yours returned again and again, relentless as the sea itself.

Zagreus’ interest sharpened into fixation.

He trained harder. Traveled further. Pushed against the limits of his realm as though breaking free might bring him closer to you. The thought of you followed him through every chamber, every escape attempt, every return. You were not a distraction.

You were a pull.

Hades noticed.

The Lord of the Dead missed very little, least of all changes in his son. He saw the pattern in Zagreus’ movements, the unfamiliar patience, the uncharacteristic focus. He recognized obsession when he saw it—he had once known it himself.

And he approved.

Not recklessly. Not openly.

Hades understood that gods did not claim what they wanted through force alone. Some bonds had to be shaped, not seized. Quiet opportunities were arranged. Paths aligned. Invitations extended between realms that rarely intersected.

The Underworld bent, just slightly.

Zagreus never realized how often Hades cleared the way. How many obstacles were removed. How many chances were allowed to exist. A father did not often interfere in matters of the heart—but when he did, it was with intent.

You felt it, too.

The pull between sea and shadow grew heavier. Dreams blurred. Tides reached places they never should have. The boundary between realms thinned, responding to something ancient and inevitable.

Zagreus did not chase you like a hunter.

He waited like fire beneath the earth—constant, patient, impossible to extinguish.

And Hades, watching from his throne, allowed it.

Because some unions were not accidents.

They were destinies that simply required permission.